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Characterization of a poly(ethersulphone) by on‐line coupling of size exclusion chromatography with NMR and FTIR spectroscopy
Author(s) -
Eichhorn KlausJochen,
Voigt Dieter,
Komber Hartmut,
Pospiech Doris
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971190135
Subject(s) - fourier transform infrared spectroscopy , size exclusion chromatography , characterization (materials science) , nuclear magnetic resonance spectroscopy , spectroscopy , materials science , polymer chemistry , chemistry , analytical chemistry (journal) , chromatography , organic chemistry , chemical engineering , nanotechnology , physics , engineering , quantum mechanics , enzyme
Abstract An on‐line detection „on the flow” during the size exclusion chromatography run using FTIR and NMR spectrometers was applied to investigate the liquid chromatographic separation process of oligomers and to identify the separated chromatographic compounds. The FTIR and NMR detectors give real‐time information about the chemical structure and functional groups of the eluated species. The preferences and limits of the on‐line coupling were discussed using an oligomeric hydroxyl terminated poly(ethersulphone) as an example. Molecular weights could be calculated from the 1 H‐NMR spectra of the separated species using the intensities of end‐group and main‐chain signals. Residues of N‐methylpyrrolidone which was used as solvent in the oligomer synthesis were identified by the FTIR detector.